摘要
We fabricated a microfluidic chip with simple structure and good sealing performance,and studied the influence of the electric field on THz absorption intensity of liquid samples treated at different times by using THz time domain spectroscopy system.The tested liquids were deionised water and CuSO_(4),CuC_(l2),NaHCO_(3),Na_(2)CO_(3) and NaCl solutions.The transmission intensity of the THz wave increases as the standing time of the electrolyte solution in the electric field increases.The applied electric field alters the dipole moment of water molecules in the electrolyte solution,which affects the vibration and rotation of the whole water molecules,breaks the hydrogen bonds in the water,increases the number of single water molecules and leads to the enhancement of the THz transmission spectrum.
作者
Jia-Hui Wang
Guo-Yang Wang
Xin Liu
Si-Yu Shao
Hai-Yun Huang
Chen-Xin Ding
Bo Su
Cun-Lin Zhang
王佳慧;王国阳;刘欣;邵思雨;黄海云;丁晨鑫;苏波;张存林(Beijing Advanced Innovation Centre for Imaging Theory and Technology,Beijing 100048,China;Beijing Key Laboratory for Terahertz Spectroscopy and Imaging,Beijing 100048,China;Key Laboratory of Terahertz Optoelectronics,Ministry of Education,Beijing 100048,China;Department of Physics,Capital Normal University,Beijing 100048,China)
基金
Project supported by the National Natural Science Foundation of China(Grant No.61575131).
